The paper/model/code was just made public today. This may be why no one is talking about it yet.
Regarding whether the size is a hassle: It's possible to run inference on a single Google Cloud TPU v3-8 device or on a server with 4x 32GB v100 GPUs. Hugging Face also has an inference API for any model on the Hub: https://api-inference.huggingface.co/docs/python/html/index....
I don't have exact numbers for latency but the inference widget is currently on a TPU v3-8 (which if I am not mistaken could roughly be compared to a cluster of 8 V100). That gives you a rough idea of the latency for short inputs.
Note that a colleague just reminded me that it is possible on a single (big) GPU with enough CPU to run inference for T5-11B (which is the size we use) with offloading -> https://github.com/huggingface/transformers/issues/9996#issu...
"Who is better, you or GPT-3?"
> GPT-3